HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

SevensanI would also like to see a button to exchange equipped artifacts between each other. For example, when you have 2 good sets of artifacts, you can quickly switch between them.

If I'm not mistaken, this is already implemented, using ctrl+1, ctrl+2... to save, and 1 and 2 to switch.That's true.
But this topic could be developed by adding a graphical interface, saving the saved outfits in the save file, and possibly saving them individually for each hero, rather than globally as it is now.